Re: Vttc's

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Vladimiro Mazzilli by way of Terry Fritz <teslalist-at-qwest-dot-net>" <mazvla-at-iol.it>



Tesla list ha scritto:Hi James,


  Do you have any photos  of your VTTC, They look very interesting.

 > Cheers!
 >
 > -- Vladi --
 > --
 > -
 >
 > Tesla list wrote:
 > >Original poster: "James by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > ><mustang3-at-cox-dot-net>
 > >Hi Group,
 > >     I sure am glad to see all the interest in the toob coils. I have a
 > > good performing horizontal coil. It produces 27 inch sparks using a 5868
 > > triode tube. These are industrial toobs rated for 500W. plate dissipation
 > > and most importantly(for tesla coils) have a graphite anode. This means
 > > they can tolerate a severe overload without going gassy. The PS is a MOT
 > > with 1/2 wave doubler. Filament transformer is a rewound MOT. The 5868
 > > needs 10V. on the fils, so my xmfr needed 10 turns of #10 THHN copper
 > > wire. The secondary is 6 in. in diameter, wound with 48 inches of #27
 > > wire. Resonant freq is 96KHz. I use the mica transmitting caps for the
 > > plate coil cap. The toob Tesla coil puts a real strain on plate caps. You
 > > always have to calculate the current in the tank cap. I have blown
 > > several caps by overcurrent. I'll enclose a couple of pictures of it. I
 > > also have a WMA video of it when it was using two 304TL tubes. I can
 > > email this if any would like it.
 > >     My vertical toob coil uses two 5868's in parallel. The secondary is 6
 > > in. in diameter, wound to 27 in length with #27 wire. It's resonant at
 > > 153KHz. With 8 - 9 KW input power it makes 36 inch sparks. It's PS is a
 > > big transformer, 6000 volts at 1A(rated).
 > >
 > >
 > >Later,
 > >
 > >
 > >James
 > >
 > >.